TRP offers a range of different moulding processes relevant to the volume, material and geometry of the components. We manufacture products ranging in size from 1mm to 2.5m x 2m (as one piece mouldings), with parts produced under vacuum for greater consistency and to avoid air inclusion. We have no minimum order quantities and can offer very short lead times, including 7 days deliveries where tooling is required (subject to the geometry and size of products).
This is used for low to medium volume requirements, it offers the advantage of lower tooling costs compared to injection moulding, and also greater flexibility for quicker set up times allowing shorter lead times.
During the compression moulding cycle, uncured rubber is loaded into an open mould, which is then closed under pressure, allowing the rubber to flow to the shape of the cavity. The blank weight and temperature must be accurately controlled. The excess rubber will be forced out of the mould creating flash to be removed after moulding. Finishing processes to remove this excess flash include cryogenic deflashing and vibratory finishing.
The compression transfer process is similar to compression moulding, the difference being the addition of a transfer pot and piston to the mould. The uncured rubber is placed in the transfer pot and is injected into the closed cavity via a number of feed gates. This process offers advantages for certain complex shapes and maintains the benefit of flexibility and lower mould costs. The process is well suited to rubber to metal boding.
Injection moulding is used for very high volume products, the initial mould cost are higher but this is offset by savings from reduced cycle times compared to compression moulding. During injection moulding the uncured rubber is injected into a runner system that feeds the rubber into the cavities.
TRP produce a wide range of rubber to metal bonded products, these include AV mounting, rollers, diaphragms, gaskets, widow seals for the nuclear industry and water stop seals for oil and gas pipelines. We are happy to produce quantities ranging for single mouldings to high volume production from large multi cavity tooling.
TRP specialise in combining PTFE (and other fluoroplastics with rubber). This produces a product with the almost universal chemical resistance of PTFE, combined with the sealing properties of an elastomer core. Applications for this technology include pump diaphragms, seals for chlorine cells, seals for chemical processing and transportation and PTFE protected plate heat exchanger gaskets. The elastomer core is selected for the physical properties required for the product.
PTFE can also be used for its low friction and sanitary properties particularly in food and pharmaceutical applications.
We produce a wide variety of ground rubber and sponge rollers. These are used in a number of paper transport applications including printing, mail sorting equipment and ATM machines.
Materials are formulated for grip and wear characteristics, with rollers ground to concentricity tolerances of +/- 0.05 mm.